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Optochin-resistant variants of Streptococcus pneumoniae
1Servicio de Bacteriologia, Instituto de Salud Carlos III, Majadahonda, Madrid, Spain.
Diagnostic Microbiology and Infectious Disease
|January 1, 1990
Abstract:
Ten Streptococcus pneumoniae clinical isolates, possessing physiologically typical pneumococcal characteristics, showed optochin-susceptible and optochin-resistant colonies around the optochin disk, when tested for optochin susceptibility. Equivocal optochin disk test results should be confirmed by bile solubility, agglutination tests, or both.